The newly created Martha’s Vineyard Savings Bank will officially open for business following Veterans Day weekend, as a result of the merger of the Martha’s Vineyard Cooperative Bank and Dukes County Savings Bank.

Regulators issued their formal approval for the combined bank last month. This weekend the two banks will combine separate operations into one. Beginning Tuesday, Nov. 13, all customers may use any of the bank’s eight branches and its Island-wide ATM network, as well as the ATM located in the Woods Hole ferry terminal. The new bank Web site will also be available.

Online and telephone banking services will be interrupted from 5 a.m. Friday until Monday morning while computer systems are combined. Also this weekend, Dukes County Savings Bank’s West Tisbury office will be closed and consolidated into the West Tisbury branch of The Martha’s Vineyard Cooperative Bank.

Bank office hours will be 8 a.m. to 5 p.m. Monday through Friday, and 8 a.m. to noon on Saturdays.